Analysis of Toll Switching Networks
R. S. Krupp · Bell System Technical Journal · 1976
Two techniques are introduced for extending C. Y. Lee's method of switching network analysis to cases of toll-type networks. The methods avoid certain inconsistent independence assumptions which would otherwise be a source of inaccuracies. One method partitions the Lee graph in a special way, while the other uses a lemma that characterizes the generating function of an average network property. Examples are worked for three-stage networks and a model of the No. 4 ess.